// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package io

import (
	"bufio"
	"io"
)

// ResettableReader is a resettable reader.
type ResettableReader interface {
	io.Reader
	Reset(r io.Reader)
}

// ResettableReaderOptions are options for a resettable reader.
type ResettableReaderOptions struct {
	ReadBufferSize int
}

// ResettableReaderFn creates a resettable reader.
type ResettableReaderFn func(r io.Reader, opts ResettableReaderOptions) ResettableReader

// defaultResettableReaderFn creates a default resettable reader.
func defaultResettableReaderFn() ResettableReaderFn {
	return func(r io.Reader, opts ResettableReaderOptions) ResettableReader {
		return bufio.NewReaderSize(r, opts.ReadBufferSize)
	}
}
